Process for making well-casing.



A. SMITH. PROCESS FOR MAKING WELL CASING.

APPLICATION FILED JUNE 2, 1911.

Patented May 28, 1912.

WITNESSES NToR ATT RNEY M03. G M

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" Annnj'nw Sana, or sim Marco, CALIFORNIA, AssIGNon T SMITH METAL PERFO- i Y f nmrmecomranwor SAN MATEQ COUNTY,'CALIFORNIA.

: To all-whonm't concern. i i

1'; Be it known that 1, ANDREW SMITH, citiaufacturingperforated-well:casing, and the ;uobject is to produce-perforated metal sheets zen of the United States,"residingrat-San =Mateo, in the county of San Mateo and State of California, have invented a new and useful- Process for. Making jwell Cas'ings, of which the following-isra specification in' such full andclear terms as will enablethose- :skilled in: the artrtorconstructand use the J semeni a This invention relates to a process of man,-

- to bez'formedusinto .pipe orto be otherwise used, wherein ,the perforations therein are of less-width thanxthe thickness of the metal sheets. 1 H

Another object of this inventionis to pro-- I; duce' perforated-metal plates for ;wellcasi. .g

.anduforotherisimilar uses, in;.which there willbe-a multitudeof-small openings of less *-width; than" tlie thickness of; the pipe, and.

. whichopenings. are Wider on one side of the plate than on? the. other 'side thereoffwhereby fine materials will .be prevented from clogajging saidopeni-ng wherethean-arrowes't side duced therein;

of theslitis placed on theqside against which; the fine materialsbear. v

Another, object :ofthe invention is to produce a pipe-wherein have its oute'r'sur,-.

faces as smooth as possible considering the large mumber of inlet openings .to; be pro- Other objects of willappear as the description proceeds,

Thisinvention is a divisional application of application Ser. No. 489,642, filed April 13,1909.

of reference is applied toFthe same ortion several forms of plates formed 'byj this process.

Figure tl is a side elevation-of length'iof pipe having; slots therein formed by? this slots being indicated by dottedlinels'iil Fig. 5 is a side sectional viewof the platesfshown' in Fig. 3. Fig. 6 is .a sectional view illus- I I cutting or shearing means. The" drawings in which the samenumeral.

j V I. Specification of Letters latent. Patented pla 28 1912 Original pplicaftlbn filed April 13, 1909, Seria 1 No. 489,642. Dividedand this application filed me, 2,

. i T Seria1No:630 .8 86. I

trating the manner of forming the opening 1n the plate and cutting off a portion of the same, and Fig. 7 is a sectional View. of the plate. showing the lips formed thereinbent in opposite directions, whereby the total 'movemento-f any given lip is reduced one- :-half over that necessary in Fig. 6 .Fig. 8

is anend yiew of Fig. 6. j, I I

'I Thenumeral 1 represents a formed tube slits '2, said slits extending around thetube in several annular series, their long dimen- I in which there are a pluralityof series ;of

versely of the tube orl sheet orin any other direction that is desired; These ,slits are formed'inthe metal bypressing up such a bodyof metal 3 (seeFig. as is illustrated .at 4, the amount of metal to be formed up into the lip 4 to bedetermined bythe capa bility otthepunch forming the same. That is to say, it has been foundby experience that the smallest hole that. can be produced inany given plate of the harder nietals by the' ordinary punching process is not less than the thickness of .the plate, punches or .dies having one dimension smaller thanthe,

. thicknessof theplate; being unable to stand the Iworlg 0t punching. In, this: case the lip thus. produced is ,smoot-hly sheared. along theedge 5,and the lengthof the metal dis tort d topioduce the cut ,is about twice. the

thicknessof the plate, thus enabling avery I strong punch to be used After the projection has been punched up as shown at 4, the outer end of the projecting portion iscut 011' along the'line' 6, by any suitable Ihave shown this cut at an acute angle to the planeof the net alsheet, but it is obvious that it may throughout the several views," ilustratei is desired. The casing may then be used in that form, should it be so desired, but

to produce avery smooth casing the projection 4 is then rolled backinto the plane of the platea's shown at 7 in Figs. 3 to 5 inclusive, 'It will be, obvious that instead of cutting a portion from the projecting portion or, lip 4, the cut may be made along the line 6 from the adjacent metal upon the the sheet, a tapering slot will result. as

opposite side of the slit, and when the pro-1; jecting lip is p'ressed'back into the plane of v pressed back into the plane of the sheet. It-

before. In case the metal is cut'from the projection along the line 6, and also from the adjacent metal upon the opposlte side of the slit along the line 6 ,'a V-shaped slot will result when the projection is will of course be understood that in forming tiling or Well casing from plates that have i been treated in this manner, it is necessary 1 through the smallest opening not being I -tained therein owing 'to the fact that the the minimum amount of the edge .5 in the form of the invention disclosed in Fi 6.

to place the narrow side of the slot out- 'wardly so that it will retain the particles outside the casing, any particles passing de is something slightly greater than the thlckness of the metal of'the plate in order that the edge 5 may be free from the body of the plate 3 to permit theiremoval therefrom of theportion sheared along the line 6. However, its total amount may be reduced by moving the metal on.opp0site sides of the slit to be produced a. small amount more .than one-half the thickness of the plate as illustrated in Fig. 7, in which the lips or pro'ections 8 are each moved ,downwardly 'slig tly more than one-half the thickness of the plate 9, while the projections-1O are.

moved upwardly slightly more than one-half the thickness of the 1plate thus producing an opening which enab to cut off therequisite amount from the end es the cutters or shears of either of the projections. It will be obvious that the metal may be sheared from the projections without the necessity of forcing the projections out beyond the plane of the sheet, that is, anamount equal to the thickness of the sheet.- ,This metal may then be used inthatformor it may be rolled back into the plane of the main sheet as desired.

It will be clear that this metal may be used' I in any place where metal having a con-.

siderable number of slots of less width than the thiclmess of the metal is desired.

I-Iavingthus described my invention what I claim as'new and desire to secureby Letters Patent .of the United-States, modifica tions within the scope of the claims being reserved, is as'follows: 4

1. In a process-of producing erforated metal plates, slitting the same to orm openings, forcing the edges of the metal adjacent the slit outward to form projecting poltions, and cutting the "terminal portions therefrom, thereby forming open passages regardless of the position of the said edges. 2. In a rocess, of producing perferated metal plates, slitting the same to form} openings, forcing the edges of the metal adja cent the slit outward to form projecting portions, cutting' the terminal portions'itherefrom, and bending the projecting portionsbackward toward the plane of the plate.

3. In a processof producing perforated metal plates, slitting the same to form openings, forcing the edges of the metal adjacent the slit outward to form'projecting. portions, cutting the terminal portiofis therefrom, and bending the projecting portions backward into the plane of the plate.

my hand this 23d day of May, A. D. 1911,

in the presence of the two subscribed witnesses. i

ANDREW SMITH. H Witnessesr, I r

. P. GRIFFIN, I .HnnnY B. L'Is'rnm- In testimony whereof I have hereunto set i 

